铝铌渣的性能及其热稳定性机制研究
Research on properties and thermal stability mechanism of aluminum-niobium slag
龚帅 1赵惠忠 1余俊 1张寒 1谈利强2
作者信息
- 1. 武汉科技大学省部共建耐火材料与冶金国家重点实验室 湖北武汉 430081
- 2. 浙江父子岭特种耐火材料有限公司 浙江湖州 313108
- 折叠
摘要
为开发利用铝热还原法制备金属铌工艺中产生的一种有色冶金废渣——铝铌渣,采用ICP、XRD、SEM、TG-DTA等表征技术对铝铌渣的化学组成、物相组成、显微结构及性能进行研究,结果发现,铝铌渣中Nb及NbO的氧化,导致铝铌渣的体积热稳定性非常差.将铝铌渣经400～1 500℃热处理后发现:高温预烧处理能有效解决铝铌渣体积热稳定性差的问题;经≥1 400 ℃预烧处理后,铝铌渣的物相组成、体积变化率均达稳定状态,且耐火度大于1 790℃,满足耐火材料对原料的基本要求,为其资源化利用奠定了良好的基础.
Abstract
To develop and utilize aluminum-niobium slag,a kind of non-ferrous metallurgical waste residue produced in the preparation of metal niobium by the aluminothermic reduction method,the chemical com-position,phase composition,microstructure and properties of aluminum-niobium slag were studied by ICP,XRD,SEM,TG-DTA and other characterization techniques.The results show that the oxidation of Nb and NbO leads to the poor volume thermal stability of aluminum-niobium slag.After heat treating the aluminum-niobium slag at different temperatures(400-1 500 ℃),it is found that high temperature pre-firing treatment can effectively solve the problem of poor volume thermal stability of the aluminum-niobium slag.After pre-firing at 1 400 ℃ or above,the aluminum-niobium slag has stable phase composition and volume change rate as well as the refractoriness＞1 790 ℃,which meets the basic requirements of refractories for raw ma-terials and lays a good foundation for its resource utilization.
关键词
铝铌渣/热稳定性/物相组成/资源化利用Key words
aluminum-niobium slag/thermal stability/phase composition/resource utilization引用本文复制引用
基金项目
辽宁省科技攻关项目(2022JH1/10800005)
出版年
2024
NETL
NSTL
万方数据